This is a good tutorial, the shading's cartoonish but it's just about pushing the textures and adding extra detail to get it more realistic. Here's the full body shot;You can probably just use this tutorial by Jay and just tweak the facial feature I believe he shows you how to model belts and straps as well so just add a few more using these techniques and you should be fine.
https://simplymaya.com/autodesk-maya-...=125&sub_cat=2